My 04 s60 2.5t is doing the exact same thing some days the vibration shaking is much worse than other days. I was reading that the CV shaft might be to blame. I don't want to have to replace all the stuff you did before finding out the problem only because I'm trading the car in or selling it so I c...

So I completed this on my HU- 613 and my first few attempts where unsuccessful as the pictures I found online the boards were nearly identical but not exactly the same. so I tried a few different spots to solder the left n right audio connection to and finally got good clean signal with no Feedback....